Pipe-making machine



Aug. 17 1926.

G. C. MARTIN PIPE MAKING MACHINE FiledfJan. 21, 1924 SShGeS-Sheet 1 IV-ENTOR. .George arf/)7;

ATTORNEYS.

Aug. 17,1926. 1,596,203

` G. c. MARTIN l PIPE MAKING MACHINE Filed Jan. l2l, 1924 5 Sheets-Sheet2 IIIIIIIIIIIIII,

i la, /27 i 5; /29

. INVEMTOR, Geo/ye C. 0r/m;

Aug. 17 1926. 1,596,203

G. C. MARTIN PIPE MAKING MACHINE- A TTORNEY6` Aug. 11,1926. 1,556,203

l G. C. MARTIN PIPE MAKING MACHINE Filed Jan. 2l, 1924 5 Sheets-Sheet 4f l!" i@ 'ff 76 "L: ,l

Aug. 17 1926.

\ 1,596,203 G. c. MARTIN f PIPE MAKING MACHINE Filed Jan. 2l, 1924 5Sheets-Sheet 5 l "Il o LIZ ../j] l /0/ I UIMM/2 3 I cui o' I I# VEN TOR,

@EGE C.'HARTIN, LOS ANGELES, GLEE'GRNIA.

'rirn-mniime MACHINE.

Application led January 21, 19245.. Serial Ho. 687,490.

This invention relates to pipe-making` machines, and particularly tomachines adapted" for the making of concrete and cement pipe, or forthat matter, any form of pipe requiring a mold in the forming of thesame.

The invention vision of a pipe-making machine which will form pipe ordiderent diameters or thicknesses., 'At the present time the ordinarytype of machine Jfor forming concrete or cement pipe, or in fact anytype of pipe, adapted to be `termed by a mold, of a plastic material,which plastic material 'is allowed to set, is adapted toform'only onediameter of pipe, and diderent machines must be resorted to when ipes oiother diameters are formed., 1Wit the limitations of the present type'of machine in view, l have provided a universal machine which may beconveniently regulated right on the ground 'where the pipe is to beformed or made, and which does not entail extensive changes and onlynecessitates one machine with different sizes of forming molds toproduce pipe of di'erent diameters. The machine is devoid of complicatedmechanism and does not require skilled labor to operate the' same. Amachine that only forms one diameter of pipe of necessity requires othermachines r'or the forming or other diameters of pipe, and this entailsgreat expense on the part oit' the owner ci such machines, whereas, withmy invention one machine is all that is necessary, with a fewattachments which may be purchased as needed. y

'lhe invention has' for a further object the provision oi a machinewhich will form the pipe so that there will be practically no voids atdierent points in the pipe, with the result that the tensile orcompressive etrength'of the pipe is the saine throughout the pipe.

lin practicing the invention l provide inner and cater molds withinwhich is a packing head eccentric to the longitudinal ares ci the molds.The packing head is associated with means tor rotating the same, islikewise the outer mold. Means is provided :tor gradually raising ,theinner mold and the packer head, as material such neat cement rorconcrete is red within the inner mold to be actednpon by the packer headYlie cement or concrete is thrown into the annular space includedbetween the has for an object the prol outer surface of the inner vmoldand the inner surface of the outer mold by centrifugal force, due to therotation of the packer head, and as the outer mold is constantly beinglrotated a pipe is graduallybuilt up. 6o Further means, of course, isprovided for regulating the rate of ascent and descent or the. packerhead and the inner mold.

With the above and other objects in view,

the invention consists inthe novel and use- 65 ful provision, formation,association and relative arrangement of parts, members and features, allas illustrated in certain of its embodiments in the accompanyingdrawings, described generally, and inally pointed out 'zo in claims.

In the drawings:

Figure l is a vertical elevation of the complete pipe forming machine;

v Figure 2 is a top plan view of the pipe 75 forming machine shown inFigure 1;

Figure 3 is a fragmentary vertical sectional view on an enlarged scale,of one of the forming members, said View being taken on the line 3-3ofFigure l;

Figure 4.- is a diagrammatic view of the means for controlling theraising or lowering of the packer head and inner mold of the machine;Figure 5 is a fragmentary view partly in'Slik section and on an enlargedscale looking directly .within the mold members, said view being takenon. the line 5--5 ot Figure 7';

Figure 6 is a fragmentary cross sectional view showing means permittingrotation 'of go the outer mold member, said. view ioemg taken on theline 6--6 ot Figure 5;

Figure 7 is a fragmentary vertical sectional view ot the mold membersand packin head, taken on the line 'l-- or Figure 5; es Cigare 8 is anenlarged ragmentary ver-v i tical sectional view of ahearing memberthrough which a square shaft is passed for rotating the packer head;

Figure 9 is a perspective view oi outer 10o mold;

Figure i() is a top plan view or the mold.

shown in Figure il;

iigure il is a iraeutary cross sectional view, on an enlarged scale, orclamping los means `tor holding the top ring ci the mold;

Figure i2 is a -ltra gmentary view in section and on an enlarged scale,et means' for centering the outer mold; and.,

iigare i3 is fragmentary cross sectional it@ itl view on an enlargedscale ot a clamping element ttor holding the outer mold to the lowerring.

Corresponding parts in all the figures are designated by the samereference characters.

Referring with particularity to the drawings, the improved pipe formingmachine is designated as an entirety by A, and said machine includes anouter mold member a, an inner mold member b, a packer head c, and meansd for controlling the raising and lowering of the inner mold b and thepacking head c, and means e and f for rotating the packing head c andthe outer mold respectivel'y; all otv which elements are used inpracticing one embodiment of vthe invention.

Primarily the invention resides in the three elements a, b, and c, theother means being necessary adjuncts in 'the operation of such i'irstnamed elements a, o and c. Reference to Figure 7 discloses an outerforming mold a which may be of the type shown in Figures@ and 10. Thismold a is so termed as to be easily detached trom the formed pipe byoperation of latching mechanism 1, which latching mechanism may includean arm member 2 associated with a shaft .3, which shaft in turn iscarried by armsA d joined with lugs 5 associated with one portion of themold, as shown at 6. It will be noted that the mold is so formed as tohave overlapping portions, as illustrated `at l and 8, the part 8 beingodset asshown at 9, to accommodate the part 7, -so that Vthe innersurface of such mold is substantially the same diameter at all points. Asecond series of lever arms l are provided, which arms are pivotally.associated with the parts 7 ot such mold, as shownk at 11 and likewisewith the shaft 3. Thus when the lever 2 is pulled. directly outwardlythe members d are rotated about the lugs and the overlapped portions arecaused to slide and thus expand 'the entire mold directly outwardly toincrease itsdiameter and release the same from the `formed pipe. lt islikewise to be noted that retaining plate members 12 lreep 'theoverlapped portion 8 in close proximity to the overlap portion 7 of themold. This mold o is adapted to rest on what may be termed a bottom ring13 and said ring is dang-ed as shown at 14. This llange is provided witha tapered surface as shown at 15. 7lhe flange is adapted to internallyflange one out the ends ot' the formed pipe. .d top ring 16 is likewiseprovided and this ring 1s flanged as shown at 17 and likewise beveled asshown at 18. llt is to be noted that the beveled portion 18 forms anexterior dange upon the formed pipe, as shown at 19. Thus the pipe endsmay be joined by the exterior llange 19 entering and cooperating withthe interior flan e of the next adjacent Lpipe. rlhis of course isusualpractice. The

menace wise permit its rotation relative to the carriage 22. It desired,conveniently mounted 24 which are adapted to ride on a track- Way 25. Abevel gear 26 is adapted' to have its teeth mesh with the tedth 21table, said carriage being journaled as shown at 27 for the reception ofa shaft 28 upon which such bevel gear 26 is mounted. Liliewise carriedon the shatt 28 is a gear 29 and the carriage is provided with anextension 30 adapted to support and carry the means f which may comprisea motor 31, the shaft ol which motor as shown at 32, is adapted to carrya worm gear 33, the teeth of which worin gear mesh with the teeth ot thegear 29. lt will thus be seen that the rotary table. may be' turned whenthe motor is in operation. The outer mold a is held locked to the rotarytable by means of clamps 34 best illustrated in Figure 13, .and in whichit will be noted that the bolt portion 35 ot' such clamp is received ina `=lshaped groove 36, the head of such bolt being received in thelateral portion of the T, and .a tail nut 3l is adapted forscrew-threaded engagement with the screw portion of the bolt so as 'toforcee member 38 downwardly, which member- 38 is provided with anextension 39 ada ted to wedge the lower flange member 40 of t ie mold a,as well as the bottom ring between such extension 39 and the top surfaceof the table 20. The nfT-shaped groove, it is to be noted, extendsradially inwardly of the rotary table, as shown in Figure 7 at 41. Aseries of such clamps wit-hin the carriage may be upon flanged wheels ofthe rotary grooves may be provided for holding the mold land the bottomring to the rotary table. The radial grooves allow adjustment inwardlyor outwardll of the clamp members so as to 'tightly c amp various sizesof bottom rings and molds to the rotary table in the formation of pipesof did-arent diameters. lt is of course essential that the mold a shouldbe properly centered with relation `to the bottoni ring; otherwise theinternal lange would be incorrectly formed, and to this end the bottomrings of different diameters may be provided with lateral holes 42within which members lf3 may be placed so as to properly center the saidmold as illustrated in Figur-es 5 and 7'. Theg top ring 16 may be heldto the mold a through the lrneduun of the clamp 413 shown in Figure 11.lt is or course understood that a series of such clamps e3 may beprovided. This clamp or clamps d3 may be 1n the form of a. toggle havingtwo arms i-l and 45 and an, intermediate arm 46, as is lll) ' if.;rot-ated et a speed proportionste to neeeeos usuel, sil ot lWbicb arepivoted to o lug member Il? essocietedwitb the mold a. The top ring 16is provided Witli e series of transverse openings or' slots i8 so thatthe liesd portion i9 oi tbe lever it muy be passed therethrough and thenlocked to suoli ring so es to clamp the ring to the mold when the arm l5is revolved to the position shown in Figure 1l. is stated, s series et'snob clamps nreerrenged around the mold.

The inner mold o likewise acts es s hopper :for tbe directing of cementor other materiel to the packing besd o, and the ssid member o isprovided with s bese member 6d, si side wellfdl et right ongles to sucb.base portion 60, seid side well ucting'to form the inner surface ot the.pipe presents e substantially curved 'surience troni the zone 62 {seelllign o), to tbe point or zone 63 Where the seid surface curvesradially inwsrdly, as shown et Sli und tben is curved outwardly or givene reverse curve from that shown in (S-'as shown et 65 to Where it againjoins the Woll as shown at 62. lt is to be noted that the curvedportions 6i and 55 ot such outer Wall is substantially -shsped, but theportion 65 ci such Well is approximately e true sro so es to conform totbe ourvature ot the peclrerhezid c. Reference to Fig. 7 shows tbehopper or bin portion ot the mold and which 1s formed by providing ziWell 67 Wbicnl ranges downwardly from the side Well 61 to the portion55. As s. Instter of tact this Well 67 forms a partof the Well 65, itbeingy noted in tbe showing that the parts of suoli member b are ellintegrally formed. The slope iven suolimember tends to direct allmateriel received Within tbe mold and upon the Well 67 directlydownwardly toward the port 65.

The pocker heed c comprises in tbe sbonk,y

ing smoothing blades Z0 and propeller blades 71. Seid packer bead o iscarried upon the shalt 72, en end portieri of suoli shaft beingreceivedin s journal portion 73 ot the bese` member 60 di the mold b.,The smoothing blades ere adopted to Contact with the inner surtsce ottbe pipe during; its formation hso as to smootb'tlie seme, While tbeblades Z1 ect to rapidly, und with pressure throw' by centrifugal torcetbe cement or concrete or like substances egninst tbe inner surtufse'oiVtbe outer mold a end tbe torce 'with which it is thrown tends to form s.homogeneous pipe. As stated the member along with tbe packer bead o isgradually rsised es the' pipe is termed, the seid pac-lier bend beingdriven or rotated in tbe direction sliovvn by tbe urrow in Figure 7, esis likewise tbe member e. Whether or not tbe member o rotates in tbesame direction es tbe pocker bead up erently metres little difference,end tbe epee s ot rotation ot the tivo members ere not necessarily tbeseine. in other Words, tile member a the end seid side Well @1 feedingspeed and quent-ity of neat cement or concrete. received upon the bin orhopper portion ot the member a to be acted upon by tlie pocker heed andthrown by centrifugal torce against the inner surface ot such niember e.As the mold a is rotated tlist portion et the pipe which lies beenformed is like- Wise rotated so es to` be smoothed by the outer surface61 of the mold b und likewise smoothed by action oi the blades 70.

The means al is so formed and constructed sind inter-related with theports to be described that the said packer bead o es Well es the innerforming mold b moy be raised et any desired speed and. lowered at will.llt is of course understood that the mold o as Well es the packer bead oere lifted simultaneously and et tbe same rete of speed ci ascent ordescent. As constituting,r such Ymeans d. l provide s.- pump member gwhich may be of conventional forro liar/ingr one or more cylinders7essliown et 90 within Wbicbere 4pistons, not shown, ciated with u cranlrshaft, es Shown at 91, which crank shaft is turned by means of the motore through various cooperating elements to be described. lt is to benoted tbsttl the means e likewise rotates the pucker heed c. ln themounting oi suoli elements e and g it is to be noted that the device essn entirety, A9 includes en upright trame member which includes twopedestal portions and 191 spaced spart to permit the 'carriage 22including-tbe rotary table 2O to be passed therebetween end tbetrack-wey 25 is so arranged es to pass between tbe said pedestal membersfor this purpose. is of course understood that the pedestal members maybe arranged in cooperating parallel pairs spaced apart so :is to eddrigidity to tbe entire treme structure and likewise to support thevarious mechanisms for actuating 'and moving the packer bend and innermold member by providing e platform h attached to and carried bysucli'pedestal members as shown in Figure 1. This platform may compriseangle iron freine members 102 upon which is supported e top-piece '103constituting e part ci tbe platform and to Wbic'n toppicce the motor emuy be bolted as sliown in Figure Q. 'llie pedestal members 100 and 101extend upwardly and beyond the seid platform h, es shown in Figure l undet their upper reaches or terminal portions there is s, transverse trememember lOl joined therewith., "ille inner mold member is provided withinwardly extending lugs 105 and rods 106 ere joined Witli such lugs andthen extend upwardly, es shown in Figure 1. Seid rods are guided andlield to tbe trarne member by ineens oi' guides 10? and 108 joined totbe platform member :i and tbe transverse treme member 101irespectivelyy A cross bead' 7' is bored so es to perinit passage o tberods i0@ tberetbrougirx Bil* the piston srms being ussoliti ' withthecross head 5i,

. such cup at the zone mar ed to where such rods may be bolted to suchcross head, as by means of nuts shown at 109. 1t thus follow-s 'that ifthe cross head were moved upwardly the inner mold would be raised, orlowered it the cross head were moved downwardly. The means al isillustrated on an enlarged scale in Figure 3 wherein it will be seenthat the said means for raising and lowering the mold as well as thepacker head c, includes elongated cylinders and 121 withinwhich arepistons 122. Said piston are elongated and joined as shown at 123 and124.-. The piston heads are provided with packing rings and 126 so as toensure close working-fit between the inner surface of the cylinders andthe piston heads. Cylinder heads 127 and 128 are provided orthecylinders 120 and 121 respectively and said cylinder heads are identicalin form, and therefore said cylinder head 12?' will be described.

Referring to Figure 3 the said head includes a Iplate 129 having anupright nnular flange 130 provided with screw-thro ds 131 so that saiddange may have a screw-threaded engagement with the screw-threadedportion 132 of the cylinder 120. The 'oppite surface of the plate 120 islikewise provided with an annular dange133 which is externallyscrew-threaded asy shown at 134. It will be. noted that the annular suchiange is likewise extended through the plate 129, and therefore permitscommunication with the interior of the cylinder 120. The said plate 129may be provided with transverse bores through which bolts 135 may bepassed so as to bolt the said cylinder head, considered as an' entirety,to a bracket member 136. Attention is directed to the fact that thecylinder head 128 is likewise carried on a bracket member 137 and inamanner identical with the cylinder head 127. The said bracket members135 and 137 are carried bythe platform member 5., The opposite end ofeach cylinder carries gland nuts 138 and 139. Glands or packing members140 within such nuts bear against the periphery of the piston members soas to ensure a Huid-tight fit therebetween. A. transverse frame member.14.1 is joined to the pedestal members as shown at 142, and secured tosuch frame member are valve members 250 and. 251. The said valve member251 is illustrated in Figure 3 and as the valve member 250J is identicalwith such valve 251 the valve 251 will be described.. Said valveincludes a base member 252 having an annular cup portion 253 through theannular ensuing of which as shown at 25s the cylin er 120 is passed. Theannular o ening of 'such cup portion is enlarged, at t e zone marked 255so as to conne a packin gland 256 between 255 and the periphery of thecylinder 129. The base 252 is opening in` weones provided withextensions 257 and 258, the extension .258 'being joined with the tramemember 1111. A. valve housing is shown at 259 and is provided with ahanged base adapted to be carried by the base 252, such base 160 beingtransversely bored so that bolts may be passed through such bores andthrough transverse threaded bores in the eX- tensions 257 and 258 of thebase 252. The head 161 of the housing 259 is annular in form to permitpassage of the cylinder 120 therethrough. The wall 162 of suchhousing259 isA spaced from the .periphery of the cylinder 120,and integrallyformed or other wise associated with the housing and within the housingare downwardly extending annular flanged members 168 and 16awhich arespaced apart and the annular openings in the same are of a size sucientto permit passage ofthe cylinder 120 therethrough. It is to beunderstood, however, that the cylinder 120 does not move, and that wherethe Words .passage of the cylinder therethrough occurs it is nrsantvthat a close working t or .engagement exists between the periphery ofsuch cylinder and the member surroun ing the same. The. said cylinder isprovided with a series of transverse bores which permit communicationwith the interior of the cylinder and the interior of the housing 259,and particularly the zone of such housing marked 166. The two flangedmembers 163 and' 164 aid in. preventin any fiuid loss along the eripheryof the cy inder froml thezone of t e houslng marked 166. A pi e 170 (seeFig. 4) carries a. T 171 and an el ow 172 with suitable connections 173and 174:, which connections communicate with the interior of the valves250 and 251 and 'particularly the zone marked 166 ol each valve, itbeing remembered that the valve 250 is identical in form with the de'-scribed valve 251. I V

A. reservoir tank m adapted to confine a liquid such as oil, is incommunication with the pipe 170, as shown by the pi e including elbowwise communicates rwith the pump g through suitable pipes 181. A pipeline 182 communicates with a second portion ot' the ump c7 and with thecylinder heads 127 an 128.

here is also a pipe v183 in communication with the tank m and the pi e182- and partic'ularl that portion of tde pipe 182 included etween thepump g and the cylinder head 127. A valve 184 is interposed in the pipe183, and a lever 185 controls the opening or closing of such valve.

"he packin head c, as stated, is associated wilth' a shaft 2, whichshaft is squared for a en rouu edagain as shown at 191 with the saidrounded portion 191 received and carried within a 4journaled bracket 192joined with the frame member 104, the terminal connections at and saidtank likeh thereof, as show-n at 199, and thenl mossos such roundedportion 191 being carried by the cross head jby suitable means,

shown at 193. The zone of chan e between the squared portion of the shat and the rounded portion 191 may be enlarged to :form a flange, asshown at 194. A frame member 200 carries a journalled bracket 201adapted to conne Within its journaled portion a bevel gear and its shank202. The opening 203 in such bevel gear is squared to permit passage ofthe squared portion 190 of the shaft 72. Anti-friction means 204 may beinterposed between the bevel gear and its shank and the journal bracket201. A bevel gear 205 has its teeth in mesh with the teeth of the bevelgear 202, and said bevel gear 205 is mounted upon a shaft 206 which isat right angles to the shaft 72. The said shaft 206 is suitablysupported in bearing ried on the platform h. A sprocket Wheel 208 ismounted upon a sleeve shaft 209, and a sprocket Wheel 210 is mountedupon a. shaft 211. rhere is a continuous chain 212 passed over theperiphery of the sprocket Wheelsv 208 and 210. Likewise mounted upon theshaft211 is a gear 213, the teeth oic which are adapted to mesh with agear 214 of greater diameter than the gear 213, and the'gear 214 ismounted upon the crank shaft 91 so as to loe-rotated when the crankshaft is rotated. Likewise mounted upon the sleeve shaft 202 is asprocket Wheel 215, and asprocket belt 216 is passed over such sprocketWheel 215 and a sprocket wheel 217 mounted on the shaft of the motor ltis noted that the sprocket `Wheel 215 is t greater diameter than thesprocket Wheel portion of 117. A clutch member o is formed to controlthe rotation oi the shafts 206 and 2.09 at the will ot the operator.Such clutch may include the usual operating arm 218 controlling movementoi? a collar 219 carried on the shaft 206, which collar is associatedTi"'h a drum which may ormay not form a part et' the gear 215, as shownat 220. Movement of? the arm 218 in one direction will `release thesleeve shaft 209 froinfthe shaft 206 and movement in a second directionwill couple the two so that such shaft 206 may be rotated, due torotation oi the sleeve shaft 208. ln this connection it is to be notedthat the motor e through the clutch may rotate the drum thereotcontinuously and the pumpy element g be inoperative, as would be theshaft 72.

in the embodiment'. ot the invention shown l provide what is known as ascraper member g; which includes tivo plate members 230 and 281, spl-cedapart, with `Woodei'l members inter erel'ietiveen, and adapted to againcperiphery of the squared 19,0 the `shaft t see Fig. 8). 'l Ynost platemember 281 members 283 adapted flanged inwardly brackets 207, whichbrackets are car-l as shown at 150 and 157.

, proper to have Contact with the periphery or the squared portion otthe shaft 72. yllhe purpose of this scraper member is to remove suchsubstances as concrete or cement or the like from a shaft so as to notin any Way clog the bearing surfaces through movement of the shafttherethrough. rllhe Wood acts as an absorber of moisture and it is notedthat the plate members are anged as shovvn at 234 and 235 to retain theWooden members in position between such plates.

It is essential when the machine as a whole is in operation with vtheouter mold being rotated, that the mold be guidedat its upper end so asto not wobble, and this is accomplished by providing the means rr whichincludes a guide ring 140 which is as shown at 141., the flanged portionbeing slotted at spaced points as shown at 142. Roller members 143mounted on shafts 144 are carried by the flanged member 141, the shafts144 ot such roller members being received within the slots 142. Spacedplate members 145 and 146 are carried by the shafts 144 and on oppositesurfaces the nuts 147 which have a screw-threaded engagement with theshafts 144are loosened, the plate members 145 and 146 'will permit aslight adjustment of the position of the shafts Within the slot 142.This adjustment or' course ermite for adjustment of the roller mem ers.Thus the roller members are so adjusted as to have contact with theperiphery of the upper ring 1G associated With the mold d. rhe guidering 140 is supported ley-means of rods 150 and 151, which rods arediametrically arranged and carried Within journaled brackets 152 and 153associated with the members 100 and 101 for one part, and with journaledbrackets 154 and 155 carried by the member 104. The cross head j isprovided with transverse bores at its ends so as to permit passage ofthe rods150 and 151 respectively therethrough. The upper end et each oi"siich rods is provided with a iiange member, Loch; collars 158 and 159are carried by each ot the rods150 and 151.

lThe operation of machine is as follows: Assume that it is desired totorni a given Tl diameter oi pipe made from some material such asconcrete, and having selected the determined the proper thickness thepipe, l then provide a given diameter o inner mold substantially asshown by the id However, l mount the out-er mold mem on the rotary table20, carried. on carriage and as shown in Figure 7. mold is provided withupper iovve members to properly form flange ends in pipe to be formed bythe d carriage carries its ovvn motor diameter or outer mold and having1,

ot the flange 141. llhus if the flanges 156 and 157.

the rotary tebie, which of course would in turn revolve the outer mold.

Reference to Figure 4 shows diagrammatically the means tor'raising orlowering.

the piston members within the cylinders, and it is to be noted that thevalve 184 may be opened or closed through the medium of the lever 185.Movement .of the lever 185 in one direction permits oil orb other fluidto be drawn from the tank through the pump and thence through the pipe183 back to the tank, while movement in a second direction forces oilfrom the pump into the cylinder heads to raise the pistons within suchcylinders. 'llhe pistons, as stated, are associated with the cross headi and it the valve is closed oil or other iiuid will lift the pistons ata speed depending upon the rate of speed of pumping action of the pumpg, as well as whether orv not the valve 184 is completely closed orpartially open, so as to divide the path of dow of the fluid. As thepistons are raised, the cross head is raised and as the shaft 72 isconnected with such cross head in a journaled bearing, said shaft willbe raised. The inner mold member is connected with the cross head y'through the medium et the rods 106. The oil is umped into the cylindersso as to complete y raise the pistons up to a point where o1l may escapeback through the port openings 165 in the cylinders and into the valvemembers and from such members back through the pipe 180 to the tank.Prior to the piston eads reaching the valve members the cross head jwill contact with the flanges 156 and 157 and lift the guide ring member140 upwardly. 1t will be noted that the parts are so arran ed that thebase portion of the inner moltgl member will be approximately even withthe base portion of the ring member 140 when the cross head j contactswith This ensures that all parts will beliftedan equal distance. Asstated, when the piston members reach the valves the oil or other fluidis allowed to return to the tank, the pump by the pressure exertedholding the pistons elevated,l

and the car with its mold is then run under and between the pedestalmembers 100 and 101 and then locked in position by any suitable meanssuch as shown at '300 and 301. It is of course understood that the carwith its mold is so positioned as to be concentric with the inner mold.The valve 184 is then opened in adjusted amounts according to movementof the lever 185 and the weight of the various-elements such as thecross head j, the rods andV the inner mold with the packer head. willforce'oil or other fluid contained within the cylinders back through thepipe 182 and into the valve, and thence through the pipe 183 into thetank. During this time the pump g will likewise be forcing oil backthroughthe valve and the pipe 183 meeneeinto the tank. Consequently anicety of balance =may bemaintained and the inner mold and the packerheadlowered at adjusted speeds. The inner mold t is lowered sutlicientlyto have the base thereof adjacent on the upper surface of the rotarytable, and it is noted that lthe periphery of such mold `will be inexact alignment with the inner surface of the bottom ring member 13. Atthis point the guide ring member 140 will have the roller members 143carried thereby adjacent the periphery of the upper ring member 16;movement of such guide ringi beyond yan adjusted point being regulatedby the lock nuts 158 and 159 through their contact with the brackets 152and v153.. The rollers maythen be adjusted so as to have portions oftheir peripheries in engagement with a portions ot the periphery of theupper ring member so as to steady the upper extremity of the mold when'the mold is in rotation. The lmotor 31 may then be fed current so as tocause the shaft of same to rotate, which in turn will rotate the outermold member through the medium of rotation of the rotary table to whichAsuch mold is attached, and the shaft 72 may commence Vits rotation bythrowing in the clutch o. Concrete or other plastic substances formingthe pipeis then poured into the inner mold so as to contact with thehopper portion thereof, bein the inclined plate 67, which will direct te material to the packer head c. The blades 71 of such packer headrapidly throw with great force the material against the inner surface ofthe outer mold, and as such mold is rotating at a given rate of speedthe pipe will be formed between the periphery of the inner mold and theinner surface ofthe outer mold. The blade portions of the packer headtend to smooth the inner surface of the pipe during its formation.Figures 5 and 7 show that the wall 61 is interrupted at the .zone orcurve marked 64, but that the wall portion thereof at this point extendsstraight upwardly as shown at 350 so that the illing of the opperportion of the inner mold b will, due tothe arrangement of this mold, atall times direct the pipe forming material to the packer head c. As thepipe is formed thevalve 184 is so controlled as to gradually raise theinner mold and of course the packer head c, and the pipe will be leftstanding substantiall as shown in Figure 7. The periphery of the 'innermold will tend to smooth the inner surface of the pipe, and as stated,the outer mold a isfbeing rotated and this rotation will of course causethe formed pipe to rotate in step with such outer mold. A liange will beformed` substantially as shown in l4`igurey 7 by the general shape ofthe lowermost ring member 13. The pipe will be closely7 formed andwithout voids, due to the pac ring action or centrifugal force neeaaoeexerted on the material forming the pipe through the medium of thepaclrer head c. Gradually the pipe which is designated by B will bebuilt up until the upper ring member is reached, whereupon a formed bylsuch upper ring member in the pipe. rlhe inner diameter of such upper'ring member is just sufficient to allow clearance ofthe periphery ofthe inner mold member therethrough. After the upper ring member has'been cleared a certain distance, the piston members will have reachedthe valve members, packer head, and the guide ring member 14() willbeabove the upper ring member so that upon releasing the locks 300 and 301the car may be moved from its position beneath the device A. Havingdetermined the setting period of the formed pipe B the outer mold maythen be released therefrom by revolving the arm 2 shown in Figures 9 andl0 so as to cause the parts 7 and 8 to slide, whereupon the outermoldmay be lifted from such pipe. ,lt is of course understood that the.upper ring member would be first lifted from the pipe by releasing theclamp members shown in Figure 11. Thus l might provide a tracks, eachhaving/or containing a rotary table, or I might providel a single carand upon lifting the formed pipe from the rotary table by lifting thelowermost ring member with some means such as block and tackle, otherpipe may be formed. For different diameters of pipe. it is onlynecessaryl to vary thldiameters of the outer mold member and t einner-mold member and then change the position of the car when it ispassed under and between the pedestal inem-` bers 100 and lOl.. 1Withrelation to any inner mold the packer head would always be the same;that is, in an off-set position or eccentric to the outer and innermolds'- The proximity of the packer head to the point of performing workensures a close packing of the material forming the pipe, and in theshowing the blades of such packer head tend to smooth the inner surfaceof the pipe during its formation.

It is obvious that various changes and modifications may be made inpracticing the invention, in departure from the particular showinglofthe drawings, without departing from the true spirit of the invention.

Having thus disclosed my invention, l claim and desire to secure byetters Patent:

1. in a pipe-making machine, the combination, of two concentric' moldsforming between them an annular space into which space pipe formingmaterial is forced, and means eccentric to the longitudinal axis of saidconcentric molds for forcing the pipe forming material into said annularspace.

2. ln a pipe-making machine, the combination, of an outer mold, an innermold, said flange will be.

whereupon the inner mold series of cars on` molds forming between theman annular space, and means for' forcing material within such annularspace; said means comprising a member adapted to be rotated to force thepipe-forming material into said annular space` by centrifugal force.

3. in a pipe-making machine, the combination', of an outer mold, aninner mold, said molds forming betweenvthem an annular space, withinsuch annular space; there being means for rotating said outer mold..

e.. In a pipe-making machine, the combination, of an outer mold, aninner mold., said molds forming between them an annular space, means forforcing material within such annular space, and 'means for raising orlowering said inner mold as the pipe is formed.

5. In a pipe-making machine, the combi`.

nation, of an outer mold, an inner mold, said molds forming between theman annular space, means for `forcing material within such annular space,means for raising orv as the pipe is lowering said inner mold rotatingthe formed, and, further means for outer mold during the forming of thepipe.

6. A pipe-forming machine, including an outer annular mold, an innermold concentric with the outer annular mold. .said inner mold beingformed with a'hopper portion adapted to direct material for the formingof a pipe to a space included between the outer mold and the inner mold.

7. A pipe-forming machine, including an outer annular mold, an innermold concen- 'tric with the outer annular mold,l said inner mold beingformed withv a hopper portion adapted to direct material for the formingof a pipe to a space included between the outer annular mold and rtheinner mold;

`there Abeing a rotatable packer head within the inner mold, said hopperdirecting the material for forming the pipe to such packer head. i

8. A pipe-forming machine, including an outer vannular mold, an innermold concentric with the outerannular mold, said inner mold being formedwith a hopper portion adapted to direct material for the forming of apipe to a space included between the outer annular mold and the innermold; there being a rotatable packer head within the inner mold, andsaid hopper directing the material for forming the pipe to such packerhead, and means for rotating such packer head.

9. A pipe-forming machine, including an outer annular mold, an innermold concentric with the outer annular mold, said inner mold beingformed with a hopper portion adapted to direct material for the formingof a pipe to a space included between the outer annular mold vandtheinnerv mold; there being a rotatable packer head within 'the inner moldand seid hopper directing the materiel for forming the pipe to suchpacker head, and ineens for rotating the outer annuler mold.

10. A pipe-forming machine, including an outer annular mold, en innermold concentric with the outer annuler mold, seid inner mold beingformed with a hopper portion adapted to direct material for the formingof a pipe to a space included. between the outer annular mold end theinner mold; there being a. rotatablepecker head within the inner moldand seid hopper directing the material for forming the pipe to suchpacker head, and Ineens for rotating the outer :innular mold; furthermeans being provided for rotating the peoiier heed. l

11. A. device of the character disclosed, including en inner mold memberformed .with e, hopper portion. y

12. A device of the character disclosedincluding a mold having e; beseportion and side well e portion of which vis given e reverse curvature.

13. A. device of the character disclosed` including e. mold having s.bese portion and side `well e portion of which is given e reversecurvature; there being iiliewise e subbase-mernberinclined downwardlylfrom the side wall toward o portion of the reverse curve of such sideweli.

14. A. device oi the cherecter disclosed, including e mold having n beseportion and side welle portion of which is given e reverse curvature;there being likewise e` subbase member inclined downwardly Jfrom theside well toward e. portion of the reverse curve of such side well; incombination with o packer heed edepted to be confined within o portionof such reverse curved portion of the side well of the mold.

15. A device. oi the character disclosed, including e mold having a beseportion and side wall e portion of which is given o reverse curvature;there being likewise o 'sub-- base member inclined downwardly from. theside well tcword e portion of the reverse curve of such side wall; incombination with a packer head adapted to be confined within e portionci? such reverse curved portion of Leonesa the side wall of the mold;there being an outer mold within which the first named mold is received,Vmateriel for forming a pipe being received within the rst mold anddirected to the packer heed. by the inclined sub-bese to becentrifugally forced between'the first named mold and the outer moldwhen the packer is-rotated.

16.` A` device of the character disclosed, including a mold hovingn.bese portion and side wall e portion of which is given e.reversecurvature; there being likewise e slibbase member inclined4downwardly from the side wall toward o portion of the reverse curve ofsuch side well; in combination with e packer head adapted to be confinedwithin e portion of such reverse curved portion of the side wall of the.Inold; there being an outer mold within which the first named mold isreceived, Amateriel for forming e. pipe being received within the firstmold end directed to the packer head by the inciined sub-base to becentrifugelly forced between the first named mold end the outer moldwhen the pocker headv is rotated, and Ineens for raising said firstnamed mold and seid packer head Ias the pipe is formed.

17. A devicey of the character disclosed, including e mold having n baseportion and side wall a portion of which is given e reverse curvature;there being likewise o subbasemember inclined downwardly lfroml the sidewoll toward e, portion of the reverse curve of such side virali; incombinetion with e -pocker heed adopted to be coniined within e portionof 'such reverse curved portion of the side weli of the mold; therebeing an outer mold within which the first named mold is received,materiel for forming a pipe being' received within the first mold unddirected tothe packer heed by the inclined sub-bose to be centrifugeilyforced between the tirst named mold and the outer mold when the pockerheed is rotated; means for raising'said first named mold and said packerhead as the pipe is formed, and means for rotating the outer mold.

In testimony whereof, lieve Signedmy neme to this specification.

GEGRGE C. MARTN.

